MasterCool 52233 - Digital Psychnometer Manual

FEATURES

• Rotating cap to protect sensor
• External Temp. probe (optional)
• LCD digital display
• Data Hold to capture readings
• Pocket size
• Low battery indicator
• Fast response, Accurate reading
• Max/Min record function
• Microprocessor circuitry for reliability
• Auto Power Off with disabling capability

CONTROLS AND INDICATORS

KEYS

1. - Power on/off
2. ˚C/˚F - Switch between ˚C and ˚F display
3. MODE - Switch between Db (air temp.) & DP display
4. HOLD - Hold display + HOLD - Disable Auto-off
5. RESET
   • Reset Min/Max memory
   • Wb and Ex (Ex for external probe only) mode switch
6. MN/MX Key
   • Display minimum or maximum memory value from power on.

Open the sensor protection cap before starting measurement in order to achieve accurate values.

AUTO POWER OFF

Unit will turn itself off after 5 minutes. To override Auto Power Off function, press + HOLD while the meter is off. When "n" appears (See Fig. A), release the HOLD key. Auto-off is now disabled.

Fig. A

MODE OPTIONS

1. Turn the protective sensor cap in a counter clockwise direction.
2. Turn meter on (See Fig. B)
3. Press the˚C/˚F key more than 1 sec. to convert reading to desired unit.

Fig. B

DATA HOLD FUNCTION

Press the HOLD key until (HLD) appears in display. The current reading is now held and will not change until Hold function is cancelled. (See Fig. D)

Fig D

Press the HOLD key again to cancel Hold function. Hold function can be used on humidity, dew-point, dry bulb, ext. temp., wet bulb.

DEW POINT/DRY BULB FUNCTION

Press the MODE key until "DP" appears on display. (See Fig. E)

Fig E

Press MODE key again to display dry bulb "Db."

WET BULB FUNCTION

Turn the meter on. User will see "Wb" temperature indicated on the display.

Ex. TEMPERATURE FUNCTION (OPTIONAL)

Plug the external probe (part # 52231) into the meter.
Short press RESET key until "Ex" appears on display.
Unit will now display external probe temperature.
See Fig. F2

Fig. F2

MIN./MAX. FUNCTION

1. Press and hold MN/MX until (MIN) appears on display. (See Fig. G)
   
   Fig. G
   
   Display now shows minimum humidity and temperature readings in memory.
2. Press and hold MN/MX key again until (MAX) appears on display. Display now shows maximum humidity and temperature readings in memory.
3. To return to current temperature and humidity readings press and hold MN/MX until Min or Max disappear from the display.
4. Press the RESET key more than two seconds to clear current readings from memory.

While checking MIN/MAX value for EX do not replace the probe otherwise an error code will display. If you don't plug the probe into socket before turning the meter on, the error code will also appear when you check the MIN/MAX value.

LOW-BATTERY

A battery symbol will appear in the top right corner of the display when the power is low. Failure to replace batteries will have an effect on the accuracy of the readings.

1. Open the battery cover.
2. Remove the expired batteries.
3. Insert 2 AAA batteries making sure the batteries are positioned with the correct polarity. Replace cover.

TROUBLESHOOTING

POWER ON BUT NO DISPLAY

1. Press ON/OFF key for more than 0.1 sec.
2. Check the batteries for correct polarity and secure contact.
3. Replace with new batteries and try again.
4. Remove the batteries for one minute and put back in for second try.

NO DISPLAY

1. If the low battery indicator displayed before the display disappeared, replace the batteries.
2. Check whether auto-off mode is active. If yes, press + HOLD or ON/OFF + HOLD key to disable auto- off function.

Er 1: Circuit error in RH measurement channel, return for repair.

Er 2: Circuit error in Internal temperature measurement channel, return for repair.

Er 3: Circuit error in reference resistor channel, return for repair.

Er 4: Internal temperature is out of the range.

Er 5: External temperature is out of the range.

Note:

1. Dry Bulb temperature means air (internal) temperature. Dew point & Web Bulb are calculated from internal temperature.
2. When the meter is on, plugging in an external probe might cause an error ("ER 5") in min. or max mode. Pressing the "RESET" key could solve this error.

OPTIONAL ACCESSORIES

• External Temperature Probe - part # 52231
• 33% Salt Solution (for calibration) - part # 52733
• 75% Salt Solution (for calibration) - part # 52775

SPECIFICATION

• Temp. Range: -20~50˚C (-4~122˚F)
• RH% Range: 0~100% RH
• Wet Bulb Range: -21.6~50.0˚C (-6.88~122˚F)
• Dew Point Range: -78.7~50.0˚C (-109.7~122˚F )
• External Temp. Range: -20~70˚C (-4~158˚F)
• Accuracy: RH% 3% at 25˚C/Temperature: 1˚F (0.6˚C)
• Response Time: 60 seconds
• Pocket Size: 24.7 (h) x 48.4 (w) x 178.5mm (l)
• Power: (2) 1.5V AAA battery

WARRANTY

This product warrants against defects in material and workmanship for a period of one year. This warranty does not cover failure due to abuse, improper usage, or progressive wear and tear.
Warranty becomes valid to the original user, effective on the purchase date. A copy of an invoice must be sent to 1 Aspen Drive, Randolph, NJ 07869 to validate the warranty. For further service please contact (973) 252-9119.

USA: PH (973) 252-9119
BELGIUM: TEL. + 32 (0) 3 777 28 48
www.mastercool.com

Documents / Resources

References

• Mastercool Inc., Manufacturer of Air Conditioning, Refrigeration, Service Tools and Equipment

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