Oki LE850 Technical Reference

Also see for LE840: User guide

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- 120 -8.81 ^JT HEAD TEST INTERVALFormat: ^JT####,a,b,c#### = The number of labels printed between executing head checks0 to 9999When omitted: 0 right after start-upIf ^JT command is already received, the previous set value is valid.a = Selection of element range to checkY : Element range is selectable.N : Element range is not selectable.When omitted: N right after start-upIf ^JT command is already received, the previously set value is valid.b = First element to check0 to 9999Default: 0When omitted: 0 right after start-upIf ^JT command is already received, the previously set value is valid.* When exceeding 9999, this is corrected to 9999.c = Last element to check0 to 9999Default: 9999When omitted: 9999 right after start-upIf ^JT command is already received, the previously set value is valid.* When exceeding 9999, this is corrected to 9999.*1 When label duplication is disabled with ^PQ command, a head check is performed at the specifiedinterval. However, when label duplication is enabled (two or more) or pause interval is enabled(one or more), a head check is performed only once before the label is issued.*2 After the printer is turned on, the head check setting is set to disabled even when this command isreceived. To enable the head check setting, ~JN needs to be received before this command.*3 Even if the print head element range is specified by this command, the head check is applied to theall elements.