5.3.2 Humidity Calibration at 75% Humidity
CASE 1 The 75% reading is too low by n counts, so DECREASE the humidity
code by n counts.
EXAMPLE 1
: you obtain a reading of 72%. The error is -3 since 72 is 3 counts lower than
75%. The initial humidity code of 67 (from Case 1: Example 1 in previous section) must
be reduced to 64 (–3 counts).
READING INITIAL ERROR CHANGED (NEW) HUMIDITY
IN 75% HUMIDITY CODE IN 75% “HUMID”
ENVIRONMENT CODE ENVIRONMENT
72 67
*
-3 64
*
* the second digit is flashing and changes in this case.
CASE 2 The 75% reading is too high by n counts, so INCREASE the humidity
code by n counts.
EXAMPLE 2
: you obtain a reading of 76%. The error is +1 since 76 is 1 count higher
than 75%. The initial humidity code of A5 (from Case 2: Example 2 in previous section)
must be increased to A6 (+1 counts).
READING INITIAL ERROR CHANGED (NEW) HUMIDITY
IN 75% HUMIDITY CODE IN 75% “HUMID”
ENVIRONMENT CODE ENVIRONMENT
76 A5* +1 A6
*
* the second digit is flashing and changes in this case.
Changing the second digit (following Section 5.2 ) does not affect readings at 33% and
lower. Check to see that the reading is 75. If it is not, adjust the second digit of the code
again.
You must continue to Section 5.4 to finish the calibration process.
Calibrating the Recorder
5
5-7
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