Hach Ultra MET ONE 237AB, User Manual, Page: 27 / 57

24
Operation
To program the settings for relative humidity/temperature:
1. To change the alarm limits, press and hold the
SELECT
key until the TEMP light is lit.
The 7-digit display will show the temperature reading and the scale being used.
2. Press and hold the
PROG
key. The light on the
PROG
key turns red. The 3-digit
display will show HI (HI indicates that the upper alarm limit is currently being
programmed). The 7-digit display shows the current alarm limit and the scale being
used and the left digit begins to flash .
3. Press and hold the
SELECT
key until the required digit begin to flash.
4. Press the
UP
and
DOWN
arrow keys to change the flashing digit to the required value.
5. Press and hold the
SELECT
key until the 3-digit display shows LO (LO indicates that
the low temp level is currently being programmed). The 7-digit display shows the
current alarm limit and the left digit begins to flash and the scale being used.
6. Press and hold the
SELECT
key until the desired digit flashes.
Note: The temperature scale is only programmable with the HI temperature alarm limit.
7. Press the
UP
and
DOWN
arrow keys to change the digit to the required value.
8. Press and hold the
PROG
key to save the new settings and exit the programming
function. The digits will not flash now and the red light on the
PROG
key will turn off.
Note: Programming the HI and LO Relative Humidity alarm limits is similar.
5.4.1 Environmental alarms
When a programmed environmental alarm limit is exceeded, an audible alarm will sound
and the
LIMIT light will light red. Press and hold any of the front panel keys to turn off the
audible alarm. If the alarm occurs when the RH or TEMP reading is not being displayed,
the appropriate TEMP or RH light will flash.