Hach HQ40d User Manual

Figure 18 Calibration history report
1 Report type (CH=calibration history) 5 Date of calibration (DD-MM-YY or user-defined format)
2 Parameter (pH, LDO, etc.) 6 Probe serial number (a “<“ or “>” on the HQ40d meter indicates the probe
position).
3 Time of calibration, prefaced by “CAL” and displayed as hh:mm in 24 h (or user-
defined) format
7 Calibration slope/ratio/constant
4 Probe model 8 Offset—contents vary depending on type of parameter and user settings. May
be blank.
32 English

Hach HQ40d Specifications

General

Resolution	0.1 °C
Connectivity	USB
Storage Temperature	-20 to 60 °C
Waterproof Rating	IP67
Display	LCD with backlight
Measurement Parameters	pH, Conductivity, Dissolved Oxygen, ORP
mV Range	-1999 to 1999 mV
Conductivity Range	0.01 µS/cm to 200 mS/cm
Temperature Range	-10 to 110 °C
Data Logging	500 data points
Power Supply	4 AA batteries
Accuracy	±0.1 °C
Operating Temperature	0 - 50 °C (32 - 122 °F)