User Guide

ManualsBrandsInkbird ManualsIndustrial & ScientificPID Temperature Controller with Relay ITC-100VH Thermostat

6.8 Parameters related to alarm output: “HiAL, LoAL, dHAL, dLAL、

6.9 Parameters related to input “ Sn, diP, diL, diH, DL, Sc”

dF, ALP, CF” 6.9.1 Sensor type input “Sn”

6.8.1 Alarm parameters: "HiAL、LoAL、dHAL、dLAL". These parameters

Table 4: sensor input code and measuring range

are for setting the alarm function of the instrument. When there is alarm

condition, the system will output alarm signals to drive alarm relay to act

(normally opened contact close/normally closed contact open), and

alternately display the alarm reasons in the bottom screen. The alarm will

be dismissed once the fault is fixed. Alarm conditions are as following:

HiAL: alarm when measured value is larger than HiAL (PV>HiAL).

LoAL: alarm when measured value is smaller than LoAL (PV＜LoAL).

dHAL: alarm when plus deviation is larger than dHAL (PV>SV+dHAL).

dLAL: alarm when minus deviation is smaller than dLAL (PV<SV-dLAL).

Generally, user don’t need 4 alarms in effect at the same time. For any

alarm not required, set it to the maximum value to avoid triggering it. For

example, set HiAL=9999, LoAL=-1999, dHAL=9999, or dLAL=9999.

6.9.2 Decimal point position “diP”

6.8.2 Defining parameter for alarm"ALP"

Decimal position “diP” is for selecting displaying accuracy. This setting is only

Table 3: defining alarm function

for display. The internal measuring accuracy is fixed to be 0.1℃.

When diP=0, it means the temperature display accuracy is 1℃.

When diP=1, 2 or 3, it means the temperature display accuracy is 0.1℃.

When the temperature display accuracy is set to be 0.1℃, while the measured

temperature is lower than 1,000℃, the temperature will be displayed with

accuracy 0.1℃; when the measured temperature is higher than 1,000℃, the

temperature will be displayed with accuracy 1℃.

Changing diP parameter can only influence the display, there is no influence to

the measuring accuracy.

6.9.3 Definition parameters "diH" and "diL" for linear input range

Above are part of common ALP setting. The setting range is 0 - 31. Linear input includes signals such as current: 0-20mV, 0-60mV;

It defines the output position of 4 alarms -- HiAL、LoAL、dHAL、

voltage: 0-1V, 0-5V; resistance: 0-80Ω, 0-400Ω. The displaying value

dHAL. It’s defined by following formula: range for the signals is -1999 - 9999 (decimal position could be set by

ALP=A×1+B×2+C×4+D×8+E×16 diP). Parameters diH and diL are used to define the display range of

When A=0, HiAL alarm is output by AL1; linear input.

When A=2, HiAL alarm is output by AL2;

When B=0, LoAL alarm is output by AL1;

6.9.4 Filtering parameter “dL”

When B=2, LoAL alarm is output by AL2; ITC-100 has in-built digital filtering system. When the displayed value is

When C=0, dHAL alarm is output by AL1; not stable due to input interference, use digital filtering to smooth it.

When C=1, dHAL alarm is output by AL2; dL=0-20, the larger the dL value, the measured value will be more stable,

When D=0, dHAL alarm is output by AL1; but respond will be more dull. When the instrument is interfered at field,

When D=1, dHAL alarm is output by AL2; gradually increase the dL value till the instant variation of measured value

When E=0, SV screen will display alternately the alarm symbols, is within 2-5 unit. When verifying the instrument, it’s a must to set dL as 0

enabling user to know the reasons for alarm quickly; to improve responding speed.

When E=1, SV screen won’t display alternately the alarm symbols

(except orAL)

6.9.5 Amendment parameter “Sc”

Alarm for input exceed measurable range (orAL) could occur when

Parameter “Sc” is for offset amendment for input to compensate the

there are improper sensor specification setting, input disconnected or deviation of sensor or input signal. For thermocouples, if there is deviation

short circuit. If such alarm occurred, the instrument will stop control, at the cold compensation, use parameter “Sc” to amend.

and keep the output value as stipulated by parameter oPL. No setting

For example, assume input signal is constant (500℃), and Sc value is

is needed for orAL.

0.0℃, then the measured temperature is 500.0℃; while Sc value is 10.0℃,

the measured temperature is 510.0℃. The default value of Sc is 0.

6.8.3 Hysteresis Band (Dead Band) parameter "dF"

This parameter shouldn’t be amended unless there is need to calibrate

For avoiding alarm signals caused by input value fluctuation, and the measurement.

consequently malfunction, the instrument has return difference

parameter dF (also called as non-sensitive zone, dead zone, or

6.10 Parameters related to control output “oPI、oPL、oPH、CtrL”

hysteresis). For example, the influence of dF parameter: assume

6.10.1 Output mode parameters "oPI", "oPL" and "oPH" are used for

HiAL value is 800 ℃, dF value is 2.0℃, then only when the measured

limiting output

temperature is larger than 802℃(HiAL+dF), the instrument enters HiAL

oPI is the mode of main output signal; oPL and oPH are the output low

alarm status. And only when the measured temperature is lesser than limit and high limit respectively.

798℃(HiAL-dF), the alarm will be dismissed.

When oPI=0, main output mode is time proportioning output (professional

6.8.4 Function parameter "CF"

PID adjustment) or digital adjustment. Models with SSR, relay, and zero-crossing

Parameter CF is for selecting some system functions: when CF=2, triggering silicon should set oPI=0.

it’s heating control; when CF=3, it’s refrigeration control. When oPI=1, output mode is continuous output (for models with linear

Lower alarm limit

Pt100

Cu50

0～1000ºC

0～1800ºC

0～1300ºC

Input

WRe

Code

Sensor type

thermocouple

Copper resistor

Alarm output

Alarm type

ALP

Upper alarm limit

Platinum resistor

Deviation low alarm

AL2

Deviation high alarm

Deviation low alarm

Upper alarm limit

Lower alarm limit

Deviation high alarm

AL1

Measuring range

-50～1300ºC

-50～1700ºC

-0～2300ºC

-2000～350ºC

-50～150ºC

-200～600ºC