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6" (152mm) Temperature & Humidity Chart Recorder

This product has been replaced by the TH6P3

Our 6" (152mm) line of humidity chart recorders feature a sleek look and feel and precision pen movement. The TH623 adds a digitial display, remote probe and alarms to make it our most versatile 6" (152mm) temperature and humidity chart recorder.

  • Digital Display
  • Remote Probe
  • Alarms
  • 6" Chart (152mm)
  • User selectable recording times and temperature ranges
  • AC power with battery backup
Th623 front 733
Th623 rt angle 519
Th623 open w chart 499
Th623 lft side 412
Th623 rt side 356
Th623 open no chart 287
Th623 back 211
Th623 probe 165

Download Images: Print Quality | Hi-Res


Important Information

Charts are sold separately.

Dickson Expert Services

Our Dickson Data Division has specially trained representatives to address the needs of customers with large installations or unique demands. Please call 888-452-4626.

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Remote Probe Icon compare check Icon compare check
Alarms
  • Audible
  • Visual
  • Audible
  • Text/SMS
  • Visual
  • Phone
  • Email
DicksonOne Compatible
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Add to Cart Add to Cart
  • Alarm Type Audio/Visual on High/Low Limits
  • Ambient Operating RH Conditions 0-95% RH non-condensing
  • Ambient Operating Temperature Conditions 32 to 122F (0 to 50C)
  • Approvals RoHS, CE
  • Battery Backup 9V Battery Back-up. Powers unit for up to 3 days.
  • Battery Life (Avg) 72 Hours (Back-up Only)
  • Calibration Options N100, N300, N400
  • Channels CH1: Temperature, CH2: Humidity
  • Chart Rotation Speed 24 Hour or 7 Day
  • Dimensions 3.25 x 7.56 x 7.56in
  • Display Dimensions Height 1.18
  • Display Dimensions Width 0.59
  • Display Resolution 0.1 Degree from -9.9 to 199.9; 1 Degree resolution above 2000 and below 9.9
  • Display Type LCD
  • Enclosure Rugged Black ABS Case, Polycarbonate Door, Aluminum Dial
  • Humidity Accuracy +/-2% RH from 0 to 60%; +/-3% RH from 60 to 95%
  • Humidity Range 0-95% RH non-condensing
  • IP Rating 21
  • Included Accessories AC Adapter, Red and Blue Pen, 9V Battery, Quick Start Guide and Probe. *Charts sold separately.
  • Keypad Functions Power On/Off, Pen Home, Alarm
  • Mounting Options Free Standing or Wall Mount (With Keyhole)
  • Power Cord 6 ft
  • Power Source 120 to 240 VAC, 12 VDC (INTL fittings available); AC Adapter
  • Power Status Indicator LED Indicator
  • Remote Probe Dimensions Houses thermistor and RH sensor in polycarbonate plastic; 1.5" x 0.5" (1.25cm x 4.5cm)
  • Remote Sensor Length 10 ft
  • Remote Sensor Type Digital Temperature Sensor
  • Response Time 5 Minutes to 63% of Full Scale
  • Temperature Accuracy +/-1.8F from 32 to 122F (+/-1C from 0 to 50C)
  • Temperature Range Help0 to 100F (0 to 50C); 0 to 185F (0 to 85C)
  • Temperature Sensor Remote Probe
  • Unit Weight 9 lbs
  • Units/Pkg 1
  • Warranty 12-Month Limited
Why should I calibrate?

All instruments lose accuracy over time due to normal usage and the environmental conditions to which they are exposed.

How often should I calibrate?

For most applications, the recommended calibration interval is every twelve months.

N100 1-Point NIST Traceable Calibration $99.00 Add
N300 3-Point NIST Traceable Calibration $156.00 Add
N400 3-Point Ultima NIST A2LA Accredited Calibration $269.00 Add
What is NIST Calibration?

NIST stands for the National Institute for Standards and Technology. This organization is responsible for maintaining the master for different measurements, such as the standard "foot", standard, "second", or standard "pound". NIST also maintains the standard for temperature, humidity and pressure.

NIST Traceable means that the measuring standard can be traced directly back to the master standard maintained by the NIST organization.

NIST-Traceable does not tell you the measurement accuracy of a metrologty service in any detail. Only metrology services that can document their ISO 17025 standard provided data on their best measurement uncertainty.

$44.00
Probe Dust Filter

Probe Dust Filter - prolong the life of your instrument.

$99.00
2-Year Warranty

2-Year Warranty

$11.00
9V Battery

9V Battery

$32.00
Universal Plug Kit for AC Adapter

Set of Three International Power Plugs for AC Adapter

$32.00
AC Adapter

AC Adapter

$15.00
AC Adapter Extension Cable

10' Power Extension for AC Adapter

C657 6" (152mm) Chart 7-Day, 0 to 100 $45.00 Add
C658 6" (152mm) Chart 24-Hour, 0 to 100 $45.00 Add
C663 6" (152mm) Chart 7-Day, 0 to 50 C $45.00 Add
C664 6" (152mm) Chart 24-Hour, 0 to 50 C $45.00 Add
C665 6" (152mm) Chart 7-Day, 0 to 200 F/C $45.00 Add
C667 6" (152mm) Chart 24-Hour, 0 to 200 F $45.00 Add
P246 3 Red, 3 Blue Pens $49.00 Add
For more information on this product and other 6" Temperature & Humidity Chart Recorders products see the 6" Temperature & Humidity Chart Recorders page.

Frequently Asked Questions

Pen adjust may be needed if the pen(s) and display do not match.  Before proceeding check your calibration date, the unit may be due for a recalibration, if so contact Dickson.

While the unit is on, press and hold both the Pen Home button and the On/Off button (making sure to press the Pen Home button first so the unit will not turn off). The led will blink rapidly between amber and green for about five seconds, the LED will then turn green, release the Pen Home and On/Off buttons. The led will flash amber and green for one second and the led will turn off.

One pen model: The red pen will move to the outer edge of the chart and is ready to be adjusted. Use the Adjust-Up and Adjust-Down buttons to move the pen to the maximum temperature line on the chart. Once the pen is set, the Pen Home button will move the pen to reaffirm the new pen position. Press the On/Off button to exit pen home adjust.

Two pen models: Both pens will move to the outer edge of the chart, and then the shorter red pen will move to the current position. Use the Adjust-Up and Adjust-Down buttons to move the pen to the maximum temperature line on the chart. Once the shorter red pen is set, the Pen Home button will move the shorter red pen to the outer edge of the chart and the longer blue pen will move to its current position. The Adjust-Up and Adjust-Down buttons will adjust the longer blue pen position. Once the pen is set, the Pen Home button will move the longer blue pen to the outer edge of the chart and the shorter red pen will move to its new position. Each time pen home is pressed the two pens will switch positions (moving the most recently adjusted position) until the On/Off button is pressed to exit pen adjust mode.

Note: Pressing the On/Off button will exit the adjustment and return the unit to normal operation. Each time the pen home or On/Off button is pressed, the adjustment currently in progress will be stored. The unit will take one minute to exit Pen Adjust Mode once the On/Off button is pressed.

1. Alarm on or off
2. Pen 1 alarm min
3. Pen 1 alarm max
(if it is a two pen unit the following states also exist)
4. Pen 2 alarm min
5. Pen 2 alarm max

To set the alarm, make sure unit is on and press and hold the Alarm button. The LED will blink red rapidly for about five seconds, and then the led will go solid green. Release the Alarm button and the led will turn red. At this point the display will show the following: ON with a delta symbol, or OFF without a delta
symbol.

Pressing either the Adjust-Up or Adjust-Down buttons, located on the back of the unit next to the dip switch, will toggle the alarm on/off.

Pressing Pen Home will scroll to the next alarm option. The options are as follows:

In order to set pen alarm minimums and maximums, pressing the Adjust-Up will increase the alarm value, and pressing the Adjust-Down will decrease the alarm value. There is acceleration if the Adjust-Up button is held down. Repetitively pressing the pen home button will scroll through the five options until the alarm button is pressed to exit from alarm adjust. Each press of the Pen Home or Alarm button will store the new settings. The unit will take one minute to exit Alarm Set Mode once the Alarm button is pressed.

If the alarm is triggered, ALRN will show on the display, the led will show as solid red and the alarm will sound. Press the Alarm button to silence Audible Alarm.

Solid Green - AC Power with Battery Backup
Blinks Red - AC Power with Low Battery or No Battery

Blinks Green - Battery Only
Solid Red - Battery Only (Low Battery)

  • If your chart does not have an Rh line it uses the same scale as the temperature.
  • Try slower, firmer key presses.
  • Maybe the unit is locked up. If the chart recorder is locked up there will be no response to button presses, however, the unit may appear to be working, but the readings won't change and the chart will not rotate. To correct this, remove ac and battery power then re-power.
  • Check AC adapter connection
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  • When the backup battery is low, the LED will flash red until the battery has been replaced.

Probe not plugged into recorder.

Plug K-thermocouple into back of recorder

What is the tolerance of the unit it is being compared to?

It's ok if the unit is within the sum of the two tolerances

Remember that the unit's tolerance speaks to the Chart Recorder only, there is any additional that applies to the probe

Has an outside calibration house attempted calibration? It may not have been adjusted properly

When was the last time the unit was sent to the Dickson Calibration Lab for a recalibration?

Walk through zero adjustment, found in the manual

For units with Pen Adjustment - rotate screw to adjust the unit to match another unit of greater accuracy after both units have stablized in the same environment.

Chart Recorders - make sure the correct chart is being used.

K-Thermocouple Units
K-Thermocouple capable units are capable of using any K-type thermocouple probe or extension but keep in mind that long extensions to extend the distance may require a Zero adjustment. (Refer to manual)
As a general rule: If the unit is not responding properly, and you have more than one thermocouple, swap probes to see if it is the probe or the unit that is defective.

Voltage Recorders

Make sure the output signal of the transmitter is calibrated to its full measuring range. 

Make sure the range selected on the recorder matches the transmitter exactly and that the proper chart is being used.

If your Chart Recorder is not moving, and seems to have been locked up, make sure that dip switch #1 is down and in the "OFF" position. The following diagram may help as well: 

Kt6_8-758