9/17/2020
Page 28 of 44
QNW TC 1 User’s Guide
There are no corresponding reference commands (see command class 13) for the TL commands.
[F1 TL +]
Ramp the sample and reference identically.
[F1 TL -] or
.
[F1 TL 0]
Ramp the sample and reference independently (the power on default).
[F1 RS S #], [F1 RS ?]
Set or query the RS parameter (# is a positive integer).
[F1 RS S #], [F1 RS ?] Set or query the RT parameter (# is a positive integer).
RS and RT provide an alternate method of setting the ramp rate.
If the last set command for RS or RT results in both set to positive values (even if the actual
setting is not changed by the command), they are used to calculate RR for actual use by the
firmware and the ramp status is set to ‘W’/waiting.
If ramp status is ‘W’/waiting or ‘+’/ramping, setting both RS and RT to 0 will change the status to
‘-‘/off (but will not change the ramp rate setting).
To Ramp the temperature:
1. equilibrate at the starting temperature;
2. set the ramp rate;
3. set a new target temperature (command class 5).
The target temperature may be above or below the current temperature; as soon as it is set, the ramp will
begin, up or down, to that new target.
After reaching the target, the controller will hold at that temperature. At any time a new ramp rate and target
temperature can be set to start a new ramp.
Once the ramp is completed, if you want to start another ramp (even using the same ramp rate) you must
send ramp rate set command. Otherwise, setting a new target temperature later will initiate a ramp to that
target temperature.
Note:
The following details aid in running T-App.
The minimum settable ramp rate (using the [F1 RR S #] command) is 0.01 °C/minute. The maximum is 10
°C/min.
For higher ramp settings, the observed rate may be lower than that specified or it may be nonlinear over part
of the temperature range because the maximum possible rate of heating or cooling is limited (and dependent
on the ramp direction as well as on the temperature).
For compatibility with the TC 125/225/425 family of controllers, when the ramping process is completed the
controller will send an [F1 TT #] response, where # will be the target temperature used to start the ramp.
Depending on automatic reply settings, an [F1 RR -] and/or [F1 IS 0++C-] response may also be sent by the
TC 1.
When the ramp status is ‘+’/On, sending a [F1 TT S #] command or a [F1 TC -] command will change the
ramp status to ‘-‘/Off.
5.11. Heat Exchanger Temperature
[F1 HT ?]
What is the current temperature of the heat exchanger?
[F1 HT +3]
Start periodic heat exchanger temperature reports every 3 seconds.
...[F1 HT 39]
The current heat exchanger temperature is 39 ºC.
