Instructions
Table Of Contents
- 1620A “DewK” Thermo-Hygrometer
- 1 Before You Start
- 2 Introduction
- 3 Specifications and EnvironmentalConditions
- 4 Quick Start
- 5 Parts and Controls
- 6 General Operation
- 7 Menu Functions
- 8 Digital Communications Interface
- 9 Calibration Procedure
- 10 Maintenance
- 11 Troubleshooting
- Index

9th number: battery monitor test
0: no error
bit15is1:error
10th number: button status (power-on test only)
0: no button press detected
bit 0 is 1: EXIT pressed during power on
bit 1 is 1: <up> pressed during power on
bit 2 is 1: <down> pressed during power on
bit 3 is 1: <right> pressed during power on
bit 4 is 1: <left> pressed during power on
bit 5 is 1: ENTER pressed during power on
8.2.11.9 STATus:ALARm?
This command reads and clears the Alarm Status Event Register. The value re-
turned indicates the condition of each of the eight bits of the register by adding
the binary-weighted values of each bit. The meaning of each bit, when set (1),
is as follows where 0 is the least significant and 7 is the most significant:
0: no alarm
Bit 0 Channel 1 temperature alarm bit.
Bit 1 Channel 1 humidity alarm bit.
Bit 2 Channel 2 temperature alarm bit.
Bit 3 Channel 2 humidity alarm bit.
Bit 4 Low battery alarm bit.
Bit 5 Power failure alarm bit.
Bit 6 Not used.
Bit 7 Not used.
Example: STAT:ALAR?
Response: 32
8.2.11.10 STATus:ALARm:CONDition?
This command reads the Alarm Status Condition Register. Reading this register
does not affect it. The value returned indicates the condition of each of the
eight bits of the register by adding the binary-weighted values of each bit. The
meaning of each bit, when set (1), is as follows where 0 is the least significant
and 7 is the most significant:
125
8 Digital Communications Interface
Commands










