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

and to the right of tick marks. Tick marks with labels are drawn with short con
-
tinuous lines, and tick marks without labels are drawn with dotted lines.
Graphs are replotted when a different display layout is selected, a display lay
-
out's settings are changed, or graph scale settings are changed. Data for the
graphs are extracted from recorded data in memory. If recording is disabled,
graphs cannot be replotted and will appear empty until new data is collected.
7.2.3 Field Data
The FIELD DATA function allows you to select a type of statistic for any of the
fields in a STAT type zone. This may be password-protected (see Section 7.5.4,
Password). Select the display layout on which to adjust the statistics field type
and then select the zone to adjust. This function can only be used with display
layouts that contain STATS zones. There are eight fields per zone. Any field
can be set to the following field types: DATE, TIME, ID, SERN, TEMP, T
RATE, T AVE, T STD, T MIN, T MAX, T SPR, T N, T RMAX, T ALAR, T
DELT, RHUM, H RATE, H AVE, H STD, H MIN, H MAX, H SPR, H N, H
RMAX, H ALAR, H DELT, DEWP, HEAT, REC CH, BATT, MEAS, or
BLANK. See Table 2 for a definition of each of these parameters.
Statistics fields show running statistics of the measurements taken since the last
statistics reset. The statistics are reset automatically after power up, when the
STATS RESET function is used (see Section 7.3.2.4), or when the time reaches
the RESTIM hour and AUT RES is enabled for the DAILY STATS (see Section
7.3.2, Daily Stats).
Field Type Description
Blank blank field
DATE current date
TIME current time
ID sensor identification
SERN sensor serial number
TEMP most recent temperature measurement
T RATE temperature rate of change
T AVE temperature statistical mean
T STD temperature standard deviation
T MIN minimum temperature
T MAX maximum temperature
T SPR temperature spread (maximum minus minimum)
T N number of temperature statistical samples
T RMAX maximum temperature rate of change
T ALAR temperature alarm count
1620A “DewK” Thermo-hygrometer
User’s Guide
34
Table 2 Statistics Zone Field Types










