Delta DTM Series - Other Input Function Settings; Channel Disabled; Temperature Units

Chapter 3: Input Function Configuration
DTM temperature controller operating manual
3-5
The calculation formula is: Displayed value = measured value * (1 + input error gain value /
1000)+ input error adjustment value
Example: The measured value is 25.0°C, input error gain value is 100, and the displayed value is
25.0 * (1 + 100 / 1000)+ 0 = 27.5°C
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
Digital filtering factor Hx030 Hx031 Hx032 Hx033 Hx034 Hx035 Hx036 Hx037
Digital filtering range Hx038 Hx039 Hx03A Hx03B Hx03C Hx03D Hx03E Hx03F
Offset Hx018 Hx019 Hx01A Hx01B Hx01C Hx01D Hx01E Hx01F
Gain Hx020 Hx021 Hx022 Hx023 Hx024 Hx025 Hx026 Hx027
Table - Input filter and temperature compensation function communications addresses
Therefore, when the error amount is fixed at different temperatures, you can directly set the input error offset
value; When the error amounts are not the same, at this time, the linearity of the error needs to be calculated
first, and the error offset value is input first, and then adjusted by the input error gain value.
 Notes:
1. x indicates the internal station number of the system or measurement expansion module.
2. Can be used in conjunction with the [temperature calibration] function in the DTM Soft (see detailed information
in Appendix C) to automatically obtain the input error offset and gain values using the measured values at two
points.
3.3 Other Input Function Settings
3.3.1 Channel Disabled
The DTM system or measurement expansion modules may disable unused input channels, which will
ensure that the error indicator light does not come when unused channels have not been connected with
sensors.
(Communications addresses and their content are as shown in the table below; channels correspond to bit
numbers: Bit0~7→CH1~8, when 0 = disabled off; 1 = disabled on
Name Address CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
Channel disable
(0: disable,
1: enable)
Hx258 Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7
3.3.2 Temperature Units
Input channel temperature units may be either °C or °F.
(Communications addresses and their content are as shown in the table below; channels correspond to
bit numbers: Bit0~7 → CH1~8, 0 =°F; 1 =°C, formula: °F =°C * 9 / 5 + 32)
Name Address CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
Temperature scale
(0:F, 1:°C)
Hx259 Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7