MODEL 315 HUMIDITY TEMPERATURE METER

5.2 Humidity Calibration

1. Turn the unit off. Press and hold the HOLD and °C/°F buttons. While

these two buttons are pressed, turn the power on. Release all buttons

MODEL 315 HUMIDITY TEMPERATURE METER

3.0 Symbol Definition and Button Locations:

 

and all the segments on the display will blink.

2.

Within 3 seconds of releasing these buttons, press the UREL button to

 

enter the calibration mode, or the instrument will revert to normal

 

operating mode.

3.

Upon entering the calibration mode, ‘CAL1’ will appear on the second

 

display.

4.

Place the probe in a stable 32.8% RH environment at 25°C and allow

 

the system to stabilize for 30 minutes. Press the MAX MIN button to

 

initiate calibration. A single long beep will indicate calibration is

 

complete, and the instrument will advance into the ‘CAL2’ mode, as

 

indicated on the second display.

5.

Insert the probe in a stable 75.3% RH environment at 25°C and again

Data Hold indication

Minmum indication

Maximum indication

Low battery indication

Auto power off indication

Relative indication Humidity display

Unit indication

Temperature display

allow the system to stabilize for 30 minutes. Press the MAX MIN button

to initiate calibration. A single long beep will indicate calibration is

complete, and the instrument will revert to normal operating mode.

5.3 Restoring Factory Calibration

1. To restore factory default calibration values, turn the instrument off.

Press the HOLD and °C/°F buttons. While these two buttons are

pressed, turn the power on. Release all buttons and all the segments

1

Feature Locations:

1) Dust mask

2) LCD display

3) ON/OFF button

4) MAX MIN button

5) HOLD button

6) RELATIVE button

7) °C, °F control button

on the display will blink.

2. Within

3 seconds of releasing these buttons, again press the HOLD

button

to restore factory calibration values. A single long beep will

indicate restoration is complete.

HUMIDITY

8) Battery cover

2

9V BATTERY

 

NEDA 1604 6F22 006P

3

4MAX MIN

5HOLD

6

REL

 

7

 

OPEN

¢XC / ¢XF

8

TEMP:

20 C

60 C

 

4 F

140 F

HUMIDITY: 0

100 %RH

5

2

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Monarch 315 Symbol Definition and Button Locations, Humidity Calibration, Restoring Factory Calibration, Feature Locations